Starbucks and A Twosome Place are the only ones of South Korea’s 10 top coffee shop franchises that are selling tumblers and flasks with replaceable tumbler parts that could help reduce waste.
Most coffee shops offer discounts for bringing in multi-use cups, as part of their efforts the use of paper, plastic, and other disposable materials.
Thus, many customers purchase tumblers at the coffee store to use them to buy drinks.
However, the rubber gaskets for tumblers sold by the coffee shops, which should be replaced regularly, aren’t readily available.
Rubber gaskets maintain the drink’s temperature and prevent the beverage from leaking out.
Many customers end up throwing away their tumblers when the rubber gasket is no longer usable, which defeats the purpose of reducing waste.
As a consequence, most South Korean coffee shop franchises that sell tumblers and flasks but fail to sell replaceable parts, such as rubber gaskets, are creating unnecessary waste.
To overcome ‘greenwashing’ criticism, experts advise the coffee shops to offer rubber gaskets.


Wall Street Slides as Warsh Fed Nomination, Hot Inflation, and Precious Metals Rout Shake Markets
Trump to Announce New Federal Reserve Chair Pick as Powell Replacement Looms
The UK is surprisingly short of water – but more reservoirs aren’t the answer
Trump Threatens 50% Tariff on Canadian Aircraft Amid Escalating U.S.-Canada Trade Dispute
Parasites are ecological dark matter – and they need protecting
Youth are charting new freshwater futures by learning from the water on the water
AI is driving down the price of knowledge – universities have to rethink what they offer
Fungi are among the planet’s most important organisms — yet they continue to be overlooked in conservation strategies
Swimming in the sweet spot: how marine animals save energy on long journeys
We combed through old botanical surveys to track how plants on Australia’s islands are changing
Why financial hardship is more likely if you’re disabled or sick
Dollar Struggles as Policy Uncertainty Weighs on Markets Despite Official Support
Indonesian Stocks Plunge as MSCI Downgrade Risk Sparks Investor Exodus
Philippine Economy Slows in Late 2025, Raising Expectations of Further Rate Cuts
How to support someone who is grieving: five research-backed strategies
An unexpected anomaly was found in the Pacific Ocean – and it could be a global time marker
What’s so special about Ukraine’s minerals? A geologist explains 



